Cap for vent-pipes.



G. I. DEHN.

CAP FOR. VENT PIPES.

APPLIOATION FILED Nov. 22, 1907.

GEO'R-GE J.. DEHN,'OF CHICAGO, ILLINOIS.

CAP non vnN'r-rIPE s.

Specification of Letters Patent.

Patented Feb. 16, 1909'.

Application filed November 22, 1907. SerialNo. 403.387.

To all whom 'it may concern:

Be'r it known that I, GEORGE J. DHN, of ,hicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin Caps for Vent-Pipes; and I do hereby declare the' following to lbe afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to an improvement in caps for vent pipes, theobject being to provide simple and effective means for detachablysecuring the cap to the free open end of the pipe, thus covering andprotecting the pipe, and at the same time providing for the free passageof air to and from the same.

W'ith this end in view my invention con sists inthe parts andcombinations of parts and in the details of construction, as will bemore fully explained and pointed out in the claims.

In' the accompanying drawings, Figure l is a view in vertical sectionthrough the upper end of apipe and showing my improvement inpositionthereon. Fig. 2 is a view of the under or concave face of the cap andFig. 3 is a view in perspective of the locking saddle.Y

l represents av pipe, which may be a vent from a sewer or closet, andwhich must .be protected against the entrance of obstructions from thetop andat the same time permit o f the free entrance and exit of air.

is the cap preferably concavo-convex in shape, and of a size to overlapthe up er openiend of the pipe. This cap is provided on its concave orlower face with a plurality of integral lugs 3,'forming seats which reston the upper edge of the pipe and sup ort the cap ina position over, butremoved rom the pipe, so as to provide free s ace for the entrance andexit of air. These ugs 3, referably four in number, are located equadistances apart, and two, or all of them are provided withdownwardlyprojecting Alegs 4, which enter the open upper end of the pipeand operate to hold the ca centrally over the pipe, the ca as shown,eing of greater diameterthan t e pipe, and the lugs or seats 3 being solocated with relation to the edge of the cap, as to bring said loweredge in a lane below the upper end of the pipe, thus ully protecting t eupper end of the pipe, and at the same time providing for freeventilation, Two of the legs 4 are arranged diametrically opposite, andea'ch is provided with laterally projecting shoulders-5 againstwhich thebifurcated ends 6 of the yielding saddle 7 bear, the bifurcated endsstraddl-ing the legs carrying shoulders 5. The lower faces of theshoulders 5 against which the ends of the saddle 7 bear, are in aplanebelow the top of the pipe l, so that when the saddle isstraightened out and thus elongated as will be explained, th'e endsthereof will engage the inner surface of the pipe and lock the cap 2thereto. This saddle which is made of metal, is curved or bow shaped.longitudinally, and is thicker at its center than at its ends, thelatter being sufficiently thin and flexible to give or yield when thecentral portion thereof is forced upwardly by the screw 8. The head ofthe screw 8 is mounted in a countersunk hole in the center of the cap,and passes downwardly through a threaded opening in the center of thesaddle, pins being provided for locking the screw to the cap and thesaddle to the screw.

rThe ends of the saddle 7 are bifurcated so as to straddle the legs 4and bear against the shoulder 5 on opposite sidesof the legs 4, hence itwill be seen, that, by turning the screw 8 in they proper direction, thecentral portion of the saddle will be drawn upwardly, while upwardmovement of theends thereof will be prevented by the shoulders 5, thuscausing the saddle to straighten out and elongate and forcing the freeends thereof into contact with the inner surface of the pipe 1. ThisContact between the endsl screw by the securing pin, it cannot be lostby dropping into pipe l nor can it be disengaged from the legs 4f.

These caps and saddles may be of various sizes to fit the differentsizes of pipe used, and the parts may be ofdifferent constructions andshapes from those described hence I would have it understood that I donot confine myself to the exact details'shown but consider myself atliberty to make such' changes and alterations as fairly come within thespirit and scope of my invention.

Having fully described my invention what l claim as new and desire tosecure by Letters-Fatent, is

il, As a new articlev of manufacture, a cover for vent pipes comprisinga cap provided with seats adapted to rest on the open upper end of apipe and with legs projecting into the pipe, the said legs havingshoulders, mscrew carried by the cap and locked thereto againstlongitudinal movement, a exible saddle mounted on the screw and havingAa sliding connection with the legs, the ends of said saddle bearingagainst theshoulders on the legs, and means for limiting the downwardmovement of the saddle on the screw, whereby the saddle is preventedroin disengagement with'tlie legs.

2. As a new article of manufacture, a cover for vent pipes Comprising acap pro- Y erases vided with seats adapted to rest on the openshoulders, a screw carried bythe cap an locked thereto againstlongitudinal movement, a flexible saddle carried by the screw and havingasliding connection with the legs, the ends or said saddle bearingagainst thenslioulders on the legs, and means for limlting the downwardmovement of tiie Saddle on tile screw, whereby the saddle 1s preventedfrom disengagement with the legs.

ln testimony whereof, l have signed this specification in the presenceof two subscribing witnesses. v GERGE J'. DEHN.

Witnesses:

` Gno. P. MCCLEULAND,

FRANK WARCH.

